The refractive index of water is 1.33. The direction in which a man under water should look to see the setting sun is

Question

The refractive index of water is 1.33. The direction in which a man under water should look to see the setting sun is (A) 49° to the horizontal (B)  90° with the vertical (C)  49° to the vertical (D) along the horizontal

Tardigrade Admin · Accepted Answer

sin θ=(1/μw) =(1/1.33) ⇒ θ= sin -1((1/1.33)) =49° to the vertical

Q. The refractive index of water is $1.33$ . The direction in which a man under water should look to see the setting sun is

$4 9^{\circ}$ to the horizontal

$9 0^{\circ}$ with the vertical

$4 9^{\circ}$ to the vertical

along the horizontal

$sin θ = \frac{1}{μ _{w}} = \frac{1}{1.33}$
$\Rightarrow θ = sin^{- 1} (\frac{1}{1.33})$
$= 4 9^{\circ}$ to the vertical

Q. The refractive index of water is 1.33. The direction in which a man under water should look to see the setting sun is

49∘ to the horizontal

90∘ with the vertical

49∘ to the vertical